7018 ACE/HCP4AH1DGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7018 ACE/HCP4AH1DGA
Basic Information
System of measurement
Metric
Weight
2.22 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
48 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
12442 lbf
Radial static load rating
13500 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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7018 ACE/HCP4AH1DGA Bearing Product Overview & Core Advantages
The 7018 ACE/HCP4AH1DGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This universal matchable bearing features a P4A super-precision tolerance class and an extra light preload (Class A), making it ideal for high-speed spindles and other precision machinery. Its design allows it to accommodate combined radial and axial loads simultaneously, offering superior rotational accuracy and rigidity in a compact form factor.
7018 ACE/HCP4AH1DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Basic bearing series, defining the standard dimensions: 90mm bore, 140mm OD, 48mm width. |
| ACE | Specific internal design and contact angle (25°). |
| HCP4AH1DGA | A complex suffix indicating a universal matchable (SU) set of 2 bearings, P4A tolerance class, phenolic cage, and specific internal clearance and preload (Extra light / Class A). |
7018 ACE/HCP4AH1DGA Bearing Structural Features & Performance Benefits
- Superior Rigidity and Precision: Manufactured to a P4A tolerance class with an extra light preload, this bearing ensures minimal runout and exceptional stability under load, which is critical for high-precision applications.
- High-Speed Capability: The combination of a lightweight phenolic resin cage and ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 15,000 rpm.
- Enhanced Load Capacity: With a 25° contact angle and robust construction, it offers a high dynamic load rating of 12,442 lbf and static load rating of 13,500 lbf, suitable for significant combined loads.
- Universal Matching Design: As a Universal Matchable (SU) bearing, it can be paired with another identical bearing in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement without selective mounting, simplifying installation and optimizing system performance.
7018 ACE/HCP4AH1DGA Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Grinding Spindles
- High-Frequency Motors
- Aerospace & Defense Systems
- Medical Equipment (e.g., Dental handpieces)
